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python - 设置相同的小部件实例不起作用

问题描述

我有一个 pyqt 应用程序，当在 gridlayout 上使用相同的 QLabel 类实例时，它不起作用。我看到只显示一个实例。

import sys

from PyQt5.QtWidgets import QApplication, QWidget, QToolTip, QPushButton, QMessageBox, QAction, qApp, QMenu, QTextEdit, QToolBar, QMdiArea, QGridLayout, QLabel, QDialog
from PyQt5.QtGui import QFont, QIcon, QPainter, QVector2D
from PyQt5.Qt import QDesktopWidget, QMainWindow, Qt, QHBoxLayout, QVBoxLayout,\
    QLineEdit
from PyQt5.QtCore import QPoint


class Example(QDialog):
    count = 0
    def __init__(self, *args, **kwargs):
        super(Example, self).__init__(*args, **kwargs)            
        self.initUI()


    def initUI(self):
        grid = QGridLayout()
        a1 = QLabel('alphanumeric characters')
        a2 = QLabel('alphanumeric characters')

        grid.addWidget(QLabel('Name'), 1, 0)
        grid.addWidget(QLineEdit(), 1, 1)
        grid.addWidget(QLabel('only alphanumeric'), 1, 2)
        grid.addWidget(QLabel('Street1'), 2, 0)
        grid.addWidget(QLineEdit(), 2, 1)
        grid.addWidget(QLabel('only alphanumeric'), 2, 2)
        grid.addWidget(QLabel('Street2'), 3, 0)
        grid.addWidget(QLineEdit(), 3, 1)
        grid.addWidget(QLabel('only alphanumeric'), 3, 2)
        grid.addWidget(QLabel('City'), 3, 0)
        grid.addWidget(QLineEdit(), 3, 1)
        grid.addWidget(QLabel('only alphanumeric'), 3, 2)

        self.setLayout(grid)
        self.setGeometry(500, 500, 500, 500)
        self.setWindowTitle('Lines')
        self.show()


if __name__ == '__main__':

    app = QApplication(sys.argv)
    ex = Example()
#     ex.show()
    sys.exit(app.exec_())

标签： pythonpyqtpyqt5qgridlayout

解决方案

首先坐标从 (0, 0) 开始，所以我已经更正了这部分。

正题，不用一对一相加，addWidget()方法重载了，所以有一个4和5的参数，分别表示行和列的跨度。

void addWidget(QWidget *widget, int row, int column, Qt::Alignment alignment = ...)

void addWidget(QWidget *widget, int fromRow, int fromColumn, int rowSpan , int columnSpan , Qt::Alignment alignment = ...)

import sys

from PyQt5.QtWidgets import QApplication, QDialog, QGridLayout, QLabel, QLineEdit


class Example(QDialog):
    def __init__(self, *args, **kwargs):
        super(Example, self).__init__(*args, **kwargs)            
        self.initUI()

    def initUI(self):
        grid = QGridLayout(self)
        a1 = QLabel('alphanumeric characters')
        a2 = QLabel('alphanumeric characters')

        grid.addWidget(QLabel('Name'), 0, 0)
        grid.addWidget(QLineEdit(), 0, 1)
        grid.addWidget(QLabel('Street1'), 1, 0)
        grid.addWidget(QLineEdit(), 1, 1)
        grid.addWidget(QLabel('Street2'), 2, 0)
        grid.addWidget(QLineEdit(), 2, 1)
        grid.addWidget(QLabel('City'), 3, 0)
        grid.addWidget(QLineEdit(), 3, 1)

        grid.addWidget(QLabel('only alphanumeric'), 0, 2, 4, 1)

        self.setGeometry(500, 500, 500, 500)
        self.setWindowTitle('Lines')
        self.show()


if __name__ == '__main__':

    app = QApplication(sys.argv)
    ex = Example()
#     ex.show()
    sys.exit(app.exec_())

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